Of course doing it that way would take ages
Well, the more powerful the ship, the more time it takes to disarm it, the front-side turrets (Turret-08-09-10-11) can be destroyed in 4:00 Min (one by minute), that 40% firepower less front that side (it still has a lot).
Using a single Wing of 4 Jotun D.H. carrying Executioners (but as always Alpha 1 performance is better than the other 3), with no cover and no hostile wings, I test this with the Gigas stopped, but if you start destroying the SBF Beams in order and the Gigas is moving forward, it would be faster to move from turret to turret (of course you start by the front to the back, in order of firepower priority).

Aside from the 05/06/08/09/10/11, the others SBF Beams, the ones that are no turrets, are located in the those claws and so the area of the SubSystem is bigger and can be more easily targeted, if you set Fire-Beam to target the reaming SBF turrets with the destroyers, the Beams does important damage to Turrets, it can even destroy them, but Miss factor, just makes it's magic and it just end taking 50% or less of the Turret life (a lot)
I believed it was impossible, but it seems to be possible (not a mission that takes an hour)...I'll keep testing a little more...adding fighters, blahblah
No we didn't learn that, just because Derelict says so doesn't make it official. Until a Colossus class goes up against a Lucifer we will never know officially.
There are 2 possibilities, and both are correct:
A - Colossus vs. Lucifer (FS or Derelict version): wins the Colossus, doesn't matter from which side the Colossus is attacked it's superior in Firepower, the Colossus can attack with all it's firepower (most beams) only if the Ship that attack is below it.
B - Colossus vs. Lucifer (FS1 version with Shield): Colossus dead
The Lucifer from FS1 was somewhat "hacked" to have a Shields (capactiy) at 1,000,000 and the Power Output (regeneration) at also 1,000,000. I don't really believe it could the Colossus could do that much damage.
It seems rare than it's supply of 1,000,000 can be regenerated at the same speed, I mean who is enough smart to have such a shield regeneration technology, but a so poor supply technology that can store the same that is regenerated by second?...(it seems to be kind of hacked so the player won't destroy the luci...)
Remember in reality Beams doesn't pierce through Shields, maybe they probabily inflict more damage in area, piercing throught that are (an explosive weapon does spread damage), even so the beams still need to pass over the shield to damage the ship.
Even so, I believe the Colossus should win if the shield regeneration would be something more real and accurate to believe than 1,000,000...